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參數(shù)資料
| 型號： | LTC1068IG |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | Clock-Tunable, Quad Second Order, Filter Building Blocks |
| 中文描述： | QUAD SWITCHED CAPACITOR FILTER, RESISTOR PROGRAMMABLE, UNIVERSAL, PDSO28 |
| 封裝： | 5.3 MM, PLASTIC, SSOP-28 |
| 文件頁數(shù)： | 9/28頁 |
| 文件大?。?/td> | 535K |
| 代理商： | LTC1068IG |
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9
LTC1068 Series
PI
FU
CTIO
N
S
U
U
Power Supply Pins
The V
+
and V
–
pins should each be bypassed with a 0.1
μ
F
capacitor to an adequate analog ground. The filter’s power
supplies should be isolated from other digital or high
voltage analog supplies. A low noise linear supply is
recommended. Using a switching power supply will lower
the signal-to-noise ratio of the filter. Figures 1 and 2 show
typical connections for dual and single supply operation.
Analog Ground Pin
The filter’s performance depends on the quality of the
analog signal ground. For either dual or single supply
operation, an analog ground plane surrounding the pack-
age is recommended. The analog ground plane should be
connected to any digital ground at a single point. For single
supply operation, AGND should be bypassed to the analog
ground plane with at least a 0.47
μ
F capacitor (Figure 2).
Two internal resistors bias the analog ground pin. For the
LTC1068, LTC1068-200 and LTC1068-25, the voltage at
the analog ground pin (AGND) for single supply is 0.5
×
V
+
and for the LTC1068-50 it is 0.435
×
V
+
.
Clock Input Pin
Any TTL or CMOS clock source with a square-wave output
and 50% duty cycle (
±
10%) is an adequate clock source
for the device. The power supply for the clock source
should not be the filter’s power supply. The analog ground
for the filter should be connected to clock’s ground at a
single point only. Table 2 shows the clock’s low and high
level threshold values for dual or single supply operation.
Table 2. Clock Source High and Low Threshold Levels
POWER SUPPLY
Dual Supply =
±
5V
Single Supply = 5V
Single Supply = 3.3V
A pulsed generator can be used as a clock source provided
the high level ON time is at least 25% of the pulse period.
Sine waves are not recommended for clock input frequen-
cies less than 100kHz, since excessively slow clock rise or
fall times generate internal clock jitter (maximum clock
rise or fall time
≤
1
μ
s). The clock signal should be routed
from the right side of the IC package and perpendicular to
it to avoid coupling to any input or output analog signal
HIGH LEVEL
≥
1.53V
≥
1.53V
≥
1.20V
LOW LEVEL
≤
0.53V
≤
0.53V
≤
0.53V
Figure 1. Dual Supply Ground Plane Connections
Figure 2. Single Supply Ground Plane Connections
0.1
μ
F
V
–
1068 F01
200
DIGITAL GROUND
V
+
0.1
μ
F
LTC1068
CLOCK
SOURCE
ANALOG
GROUND
PLANE
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
STAR
SYSTEM
GROUND
1068 F02
200
DIGITAL GROUND
FOR MODE 3, THE S NODE
SHOULD BE TIED TO PIN 7 (AGND)
V
+
LTC1068
R
A
R
B
CLOCK
SOURCE
0.1
μ
F
V
AGND
0.47
μ
F
(1
μ
F FOR
STOPBAND
FREQUENCIES
≤
1kHz)
ANALOG
GROUND
PLANE
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
STAR
SYSTEM
GROUND
DEVICE
LTC1068
LTC1068-200
LTC1068-25
LTC1068-50
R
A
10k
11.3k
R
B
10k
8.6k
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1068IG-200 | CONNECTOR ACCESSORY |
| LTC1068IG-25 | Metal Connector Backshell; Connector Shell Size:15; For Use With:MIL-C-3899 Series III and IV Connectors; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No; Contact Plating:Cadmium Over Nickel RoHS Compliant: NA |
| LTC1068IG-50 | STR RELIEF SZ 17 BLK ANDZ RoHS Compliant: No |
| LTC1068IN | CONNECTOR ACCESSORY |
| LTC1068 | Clock-Tunable, Quad Second Order, Filter Building Blocks |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1068IG#PBF | 功能描述:IC FILTR BUILDNG BLK QUAD 28SSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1,000 系列:- 濾波器類型:連續(xù)時間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) |
| LTC1068IG#PBF | 制造商:Linear Technology 功能描述:IC, FILTER BUILDING BLOCK, 50KHZ SSOP-28 |
| LTC1068IG#TR | 功能描述:IC FILTER BUILDG BLK QUAD 28SSOP RoHS:否 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1,000 系列:- 濾波器類型:連續(xù)時間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) |
| LTC1068IG#TRPBF | 功能描述:IC FILTR BUILDNG BLK QUAD 28SSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 濾波器 - 有源 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1,000 系列:- 濾波器類型:連續(xù)時間，帶通低通 頻率 - 截止或中心:150kHz 濾波器數(shù):4 濾波器階數(shù):8th 電源電壓:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) |
| LTC1068IG-200 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Clock-Tunable, Quad Second Order, Filter Building Blocks |
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